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This is the progam using inheritence, what is the order of calling constructors and what is the output?
Public Class ConstructorEx
Public Class Class1
Dim a As Integer
Sub New()
a = 1
Console.WriteLine("a in initialized in Class1")
End Sub
End Class

Public Class Class2
Inherits Class1
Dim b As Integer
Sub New()
b = 1
Console.WriteLine("b in initialized in Class2")
End Sub
End Class
Public Class Class3
Inherits Class2
Dim c As Integer
Sub New()
c = 1
Console.WriteLine("c in initialized in Class2")
End Sub
End Class

Shared Sub main()
'Creation of the object of type Class3
Dim c As New Class3()
Console.ReadLine()
End Sub
End Class

Posted By :Asha.MP     Posted Date :October 26, 2010    Points :10   Category :ASP.Net 
In this example creation of the object of type class3 calls the Class3 constructor and that constructor calls Class2 Constructor Class2 Calls Class1 Constructor.So first Class1 constructor will execute and then control will be trasfered to class2 constructor,After executing the class2 constructor the control will be treansfered to Class3 constructor.
means

Class1
|---->Sub New()---------------------|
| 'First it will execute <-----|
| End Sub |
| |
| Class2 |
|--->Sub New()----------------------|
| 'Second it will execute<-------|
| End Sub |
| |
| Class3 |
----Sub New()-----------------------|
'Third this will executes<-----|
End Sub

Means In the Creation of the object of type C, First Class1 Constuctor initializes the data, then class2 then class3.

So output of this program is
a in initialized in Class1
b in initialized in Class2
c in initialized in Class3


You can also find related Interview Question to This is the progam using inheritence, what is the order of calling constructors and what is the output? Public Class ConstructorEx Public Class Class1 Dim a As Integer Sub New() a = 1 Console.WriteLine("a in initialized in Class1") End Sub End Class Public Class Class2 Inherits Class1 Dim b As Integer Sub New() b = 1 Console.WriteLine("b in initialized in Class2") End Sub End Class Public Class Class3 Inherits Class2 Dim c As Integer Sub New() c = 1 Console.WriteLine("c in initialized in Class2") End Sub End Class Shared Sub main() ''Creation of the object of type Class3 Dim c As New Class3() Console.ReadLine() End Sub End Class  below: 

Consider the following code:

public class Example extends Thread
{
public void run()
{
System.out.println ("Hello");
}

public static void main (String args[])
{
new Example();
}
}

Select the correct option regarding the preceding code ?

  
1, The code will not compile.
2, The code will compile but will not execute.
3, The code will compile, execute, and display Hello as the output.
4, The code will compile, execute, but will not display anything.

Answer : 4 (More...)

Consider the following two classes:

public class Example1
{
public static int num;
static
{
num=5;
}
}


public class Example2
{
public static void main(String[] args)
{
System.out.println(Example1.num);
}
}

Select the correct option regarding the preceding classes.?

  
1, The Example2 class will execute without any output.
2, The Example2 class will execute with the following output:5

3, The Example2 class will not compile as it does not calls the constructor of the Example 1 class.
4, The Example2 class will not execute as it does not calls the constructor of the Example 1 class.

Answer : 2 (More...)

How can I look up a parent class method or property of any System-level object?

  
Use the Class View window, accessed from the standard toolbar by clicking View | Class View. (More...)

What type of code (server or client) is found in a Code-Behind class?

  
Server-side code since code-behind is executed on the server. However, during the code-behind's execution on the server, it can render client-side code such as JavaScript to be processed in the clients browser. But just to be clear, code-behind executes on the server, thus making it server-side code. (More...)

Which method is used to serialize an object into an XML document from Xmlserializer class?

  
The "Serialize" method is the first step of serialize process and used to create an XML document (More...)

In which order the constructor is called for an inherited class?

  
Constructor of Parent class is called

Then,

Constructor of Child class (More...)

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